Experimental investigation of the effect of ground surcharge on the structural behavior of a quasi-rectangular tunnel  

作　　者：Yong YUAN Shu LIU Zhengliang XU Xiuzhi WANG Syed Muhammad Mudassir ZIA Jiao-Long ZHANG 

机构地区：[1]State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China [2]College of Civil Engineering,Tongji University,Shanghai 200092,China [3]Shanghai Urban Construction Design and Research Institute(Group)Co.,Ltd.,Shanghai 200125,China [4]Shanghai Shentong Metro Group Co.,Ltd.,Shanghai 201103,China [5]Shanghai Tongji Green Building Prefabrication Construction Engineering Technology Co.,Ltd.,Shanghai 200092,China

出　　处：《Frontiers of Structural and Civil Engineering》2025年第3期427-444,共18页结构与土木工程前沿(英文版)

基　　金：Financial support,jointly provided by the Ministry of Science and Technology of China(No.2021YFE0114100);the Federal Ministry of Education,Science,and Research(BMBWF)of Austria(No.CN11/2021)for the project“Intense Upgrades of the New Austrian Tunnelling Method(NATM)and Demonstration of its Applicability to High-Quality Urban Development”,is gratefully acknowledged;the National Natural Science Foundation of China(Grant No.U1934210);the Science and Technology Commission of Shanghai Municipality(Nos.21DZ1203505,22DZ1203005,21DZ1202803,and 21DZ1202806);the Shanghai Rising-Star Program(No.22QB1405000)for their financial support of this work.

摘　　要：The infrastructure in the urban core area is becoming increasingly dense,leading to restrictions on intensive development;however,there is a lack of adequate research on the structural mechanics of quasi-rectangular pipe jacking tunnels.This paper presents an experimental investigation that was conducted to analyze the impact of ground surcharge on the structural behavior of a quasi-rectangular tunnel located at Jing’an Temple station of Shanghai Rail Transit Line 14.The experimental setup included a scaled-down model of a quasi-rectangular tunnel,which was considered to be typical of underground structures.A series of tests were carried out by applying varying surcharge loads and eccentricities on the ground surface located above the tunnel.The tunnel structure’s response was monitored and analyzed through the use of earth pressure gauges,displacement sensors,and strain gauges.The experimental results revealed that ground surcharge on existing tunnels is mainly influenced by eccentricity and depth,with distinct effects at zero eccentricity and increasing eccentricity.Shallow tunnel burial depths intensify the impact of ground surcharge on the tunnel structure.

关 键 词：quasi-rectangular pipe jacking ground surcharge model test safety assessment intensive construction technology 

分 类 号：U45[建筑科学—桥梁与隧道工程]